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Zope has a function "get_valid_userids()". Now my question; How is it possible to get something like (username;role;path)?

refer to the ZQR: http://zdp.zope.org/projects/zqr/ZopeQR and look for the section describing the AUTHENTICATED_USER object.

Thanks seb, but i need to get (username;role;path) for all users (i.e. 500) of a zope site. AUTHENTICATED_USER seems to be only for the current user. sven